高中英语 unit 1 great scientists（第2课时）warming up and reading课件 新人教版必修5.ppt

Great scientists,Unit 1,Words and expressions,What do you know about great scientists? Try this quiz and find out who knows the most?,Are you ready? Let’s go!,1. Which scientist discovered that objects in water are lifted up by a force that helps them float?,Archimedes,It’s…,2. Who wrote a book explaining how animals and plants developed as the environment changed?,Charles Darwin,3. Who invented the first steam engine?,steam engine,It’s used for taking water out of mines.,,James Watt,4. Who used peas to show how physical characteristics are passed from parents to their children?,Gregor Mendel,It’s used in the treatment of some diseases, especially cancer.,radium,What’s this?,5. Who discovered radium?,Marie Curie,6. Who invented the way of giving electricity to everybody in large cities?,Thomas Edison,7. Who was the painter that studied dead bodies to improve his painting of people?,Leonardo da vinci,8. Who invented a lamp to keep miners safe underground?,Sir Humphry Davy,9. Who invented the earliest instrument to tell people where earthquakes happened?,Zhang Heng,Do you know what black hole means?,10. Who put forward a theory about black holes?,Pre-Reading,Do you know how to prove a new idea in scientific research? Discuss in small groups the stages in setting out a new scientific idea.,relating to science, or using the organized methods of science.,scientific,a scientific discovery,a scientific experiment,a scientific theory,Draw a conclusion Think of a method Collect results Make up a question Find a problem Analyse the results Find supporting evidence,What order do you put them in? Why?,Think of a method,Collect results,Make up a question,Find a problem,Analyse the result,Draw a conclusion,,,,,,What do you know about infectious diseases?,a kind of infectious diseases,What do you know about cholera?,a serious infection of the bowels caused by drinking infected water or eating infected food, causing diarrhoea, vomiting and often death.,霍乱,Is it the right way?,Discuss,Look at the picture, the map and the title and predict the content of the reading passage. Then skim it quickly to see if you were right.,Reading,Do you know what did this map was used for in 1854?,Finding out the cause of Cholera.,Who defeats “King Cholera“? What happened in 1854? How many people died in 10 days? Why is there no death at No. 20 and 21 Broad Street as well as at No. 8 and 9 Cambridge Street?,Task 1:Skim and Scan,1.Who defeats “King Cholera“? 2. What happened in 1854? 3. How many people died in 10 days?,John Snow,Cholera outbreak hit London.,500,4. Why is there no death at No. 20 and 21 Broad Street as well as at No. 8 and 9 Cambridge Street?,These families had not drunk the water from the Broad Street pump.,A map of Broad Street,What method did he use?,Broad Street,,Many deaths happened here.,No death happened here.,,The water from the pump was to blame.,Public house,Draw a conclusion,Find a problem,Make up a question,Think of a method,Collect results,Analyse the results,,,,,,Para 1,Para 2,Para 3,Para 4,Para 5,Para 6,,,,,,,,Match them,Analyse results,,Para 7,Task 2,,Read and answer,1 Why couldn’t the cholera be under control at first? 2 Which theory did John Snow believe in?,Neither its cause, not its cure was understood.,People absorbed cholera into their bodies with their meals.,3 John Snow finally proved the theory he believed by ________. A. gathering information with the help of a map B. looking into the source of the water for Broad Street and Cambridge Street C. separating those who suffered cholera from those who didn’t D. both A and B,,4. To prevent the cholera from spreading again, what did John Snow do?,Suggested that the source of all water supplies be examine. Suggested that new methods of dealing with polluted water be found. Instructed the water companies not to expose people to the polluted water anymore.,Task 3,,Mind Map of the text,John Snow began to test two theories. An outbreak of cholera hit London in 1854. John Snow marked the deaths on a map. He announced that the water carried the disease. John Snow investigated two streets where the outbreak was very severe. King Cholera was defeated. He found that most of the deaths were near a water pump. He had the handle removed from the water pump.,2 1 4 7 3,8,5,6,Read the passage and number these events in the order that they happened.,,,,Discussion: Discuss the following questions in groups of four.,1.,2.,3.,Cholera was a 19th century disease. What disease do you think is similar to cholera today ? Why?,John Snow believed Idea 2 was right. How did he finally prove it?,Do you think John Snow would have solved this problem with- out the map? Give a reason.,Two diseases, which are similar today, are SARS and AIDS because they are both very serious, have an unknown cause and public health care to solve them.,,Keys,1.,No. The map helped John Snow organise his ideas. He was able to identify those households that had had many deaths and check their water-drinking hab。